Mid-infrared electroluminescence from InAs self-assembled quantum dots

D. Wasserman, S. H. Howard, C. Gmachl, S. A. Lyon, J. Cederberg, E. A. Shaner

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Electroluminescence from self-assembled InAs quantum dots in cascade-like unipolar heterostructures is demonstrated. Initial results show weak luminescence signals in the mid-infrared from such structures, though more recent designs exhibit significantly stronger luminescence with improved designs of the active region of these devices. Further studies of mid-infrared emitting quantum dot structures have shown anisotropically polarized emission at multiple wavelengths. A qualitative explanation of such luminescence is developed and used to understand the growth morphology of buried quantum dots grown on AlAs layers. Finally, a novel design for future mid-infrared quantum dot emitters, intended to increase excited state scattering times and, at the same time, more efficiently extract carriers from the lowest states of our quantum dots, is presented,.

Original languageEnglish (US)
Title of host publicationOptical Methods in the Life Sciences
Pages63860E
DOIs
StatePublished - 2006
EventOptical Methods in the Life Sciences - Boston, MA, United States
Duration: Oct 1 2006Oct 3 2006

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume6386
ISSN (Print)0277-786X

Other

OtherOptical Methods in the Life Sciences
CountryUnited States
CityBoston, MA
Period10/1/0610/3/06

Keywords

  • Electroluminescence
  • Growth morphology
  • Mid-infrared
  • Polarized emission
  • Quantum dots

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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